Colorcode
Colorcode adds basic highlighting of wiki syntax to the textarea, when you edit a page.
Recognized wikitext is green, error syntax is in red.
Colorcode is enabled in the default and the wiki skin.
To enable Colorcode, you need to add the following lines into the header of the skin.
<link rel='stylesheet' href="inc/skins/editzone.css"/>
<script src="inc/skins/editzone.js">
<script>window.onload = colorCodeInit